qcacmn: WDS and AST specific code under different compile time flag

Based on requirement from customer we have re-organised
AST specific and WDS specific code under different compile
time flags.

Change-Id: Icbb0dff7c2e7a2239d82c296468fa8d3e4f53021

dp/wifi3.0/dp_tx.h

@@ -179,6 +179,11 @@ static inline void dp_non_std_tx_comp_free_buff(struct dp_tx_desc_s *tx_desc,
 
 #ifdef FEATURE_WDS
 void dp_tx_mec_handler(struct dp_vdev *vdev, uint8_t *status);
+#else
+static inline void dp_tx_mec_handler(struct dp_vdev *vdev, uint8_t *status)
+{
+	return;
+}
 #endif
 
 #ifdef ATH_SUPPORT_IQUE